October 13 marks the birthday of the U.S. Navy. To celebrate the many responsibilities of the U.S. Navy, we're highlighting resources focusing on its role in scientific endeavors supporting military and civil water navigation safety.
The Nautical Almanac features practical applications for celestial navigation. For over 150 years, the United States Nautical Almanac Office has published The Nautical Almanac, first as part of the American Ephemeris and Nautical Almanac and then on its own, to provide the U.S. Navy with a convenient form of the astronomical data used for celestial navigation. This book is still the standard resource for marine celestial navigation for the U.S. Navy.
The Astronomical Almanac contains a wide variety of both technical and general astronomical information. A worldwide resource for fundamental astronomical data. Contents Include:
PHENOMENA - seasonal information, Moon phases, configurations of t planets, eclipses, etc.
TIME-SCALES & COORDINATE SYSTEMS - calendar information, time scale information, universal and sidereal times, Earth rotation angle,
SUN – MOON –PLANETS - detailed positional information,
STARS & STELLAR SYSTEMS - mean places for bright stars, double stars,
TABLES & DATA - Julian dates, astronomical constants, relations between time scales, and more.
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